Ship the Apache-2.0 licence text this crate actually claims

The LICENSE file carried over from the standalone repo was MIT, while
Cargo.toml declares Apache-2.0, the workspace this crate was extracted from
is Apache-2.0, and the website says Apache-2.0. The one file a reader opens
to check was the only place saying otherwise.

Replaces it with the full Apache-2.0 text and adds the matching NOTICE, both
taken from the monorepo root where they were already correct.

Caught before the repository was made public.

NOTICE

@@ -0,0 +1,16 @@
+Lumbridge
+Copyright 2026 Karti Tripathi
+
+This product includes software developed by Karti Tripathi.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.